The frigate, the Belle Poule, was cruising in the open sea for the purpose of finding the cruiser Le Berceau,from which she had been separated by a violent storm.It was broad daylight and in full sunshine. Suddenly the watch signalled a disabled vessel; the crew looked in the direction signalled, and every one, officers and sailors, clearly perceived a raft covered with men towed by boats which were displaying signals of distress. Yet this was nothing more than a collective hallucination. Admiral Desfosses lowered a boat to go to the rescue of the wrecked sailors. On nearing the object sighted, the sailors and officers on board the boat saw "masses of men in motion, stretching out their hands, and heard the dull and confused noise of a great number of voices." When the object was reached those in the boat found themselves simply and solely in the presence of a few branches of trees covered with leaves that had been swept out from the neighbouring coast. Before evidence so palpable the hallucination vanished.